class_docstr: The IOB tagger used by the chunk parser.
code: def _classifier_builder(self, train):
      return MaxentClassifier.train(
          train, algorithm="megam", gaussian_prior_sigma=1, trace=2
      )
  
imports: import os
  import pickle
  import re
  from xml.etree import ElementTree
  from nltk.tag import ClassifierBasedTagger, pos_tag
  from nltk.chunk.api import ChunkParserI
  from nltk.chunk.util import ChunkScore
  from nltk.data import find
  from nltk.tokenize import word_tokenize
  from nltk.tree import Tree
label_desc: Use image node_id 2 for calling the NEChunkParserTagger obj's underlying member method code with example usage: obj._classifier_builder(train) and returns: MaxentClassifier